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V 4 Sheets-Sheet 1. H, DUDEOK.

Engine Lathe.

No. 230,253. Patented July 20, 1880.v

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N.PETERS, FHDTO-LJTHOGRAPMER. WASHINGTON, D. C.

f V 4 Shee1+Sheet 3. 'H. DUDE-CK. Engine Lathe.

No. 230,253. Patented'luly 20,1880.

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wiw g7 rimfiw N. FE'ERS, PNOTD-LITHOGRAPHER, WASHINGTON D O UNITEDSTATES PATENT OFFICE.

METHLOW & 00.,

OF SAME PLACE.

ENGlNE-LATH E.

SPECIFICATION forming part of Letters Patent No. 230,253, dated July 20,1880.

Application filed August 1, 1879.

To all whom it may, concern Be it known that I, HUGO DiiDEOK, of Berlin,in the Empire of Germany, have invented certain new and usefulImprovements in Engine-Lathes, of which the following is aspecification.

This invention relates to an' improved attachment for engine-lathes bywhich bodies of round, elliptical, oblong, and other irregular shapesmay be turned in asmooth and regular manner.

The invention consists of an attachment to engine-lathes by which theface-plate that carries the object to be turned is kept by suitable mechanism in gear with a (l riving-pinion, while two guides, which slide atright angles to one another and are again guided in a stationaryring-frame, support the face-plate and cause it to follow steadily themotion of the drivinggear.

In the accompanying drawings, Figure 1 represents a sectional sideelevation of an engine-lathe with my improved attachment; Fig. 2, ahorizontal section of the same on linear m, Fig. 1. Figs. 3, 4, 5, and 6are vertical transverse sections, respectively, on lines y y, z z, '0'v, and w w, Fig. 1.

Similar letters of reference indicate corresponding parts.

In the drawings Arepresents the face-plate of my improved engine-lathe,which face-plate is'connected, by means of a threaded rod or bar, B,with a second or rear face-plate, 0, back of the same. The rearface-plate, O, is provided with a number of radial slots, to which atoothed frame, D, of any desired shape, is attached by means ofscrew-bolts. The toothed frame D may be of any desired shape,

according to the form to be given to the object to be turned on thelathe, the frame shown in the drawings being a rectangular figure withstraight side pieces, I), and quadrantal corners a. The toothed frame Dand the face-plates O and A are set in motion by avpinion, F, at the endof a spindle, E. The constant intermeshing of the toothed frame D andpinion F is secured by a vertical guide, Gr, sidewise of the pinion,between which and the pinion the toothed frame is guided when in motion.The

frame D is supported, with the face-plate (J, on the pinion F, andprevented, by a collar, f, in

- connection with a raised guide, d, of frame D,

against being shifted in longitudinal direction, the face-plate Gperforming the same office on the other side. By the joint action of thefaceplate (I, vertical guide G, and encircling-guide d the pinion Fcannot free itself from the frame D, as shown in Fig. 3, and keeps,consequently, the face-plates O and A continually in motion.

For turning objects of different shapes the toothed frame has to bechanged to the required form, the slots and bolts serving for properlyattaching the same. Every point of the face-plates A and G will thenmove in a curve which conforms to the shape of the toothed frame D.

To enable the face-plate A to follow the motion imparted thereto by thedriving-gearitis supported in guides, which provide for the horizontal,vertical, and rotary motion of the face-plate, as required by the shapeof the toothed frame. The rotary motion is obtained by means of a disk,L, which is guided in a ring-shaped frame, M, that is permanentlysecured to the supporting-frame of the lathe. The disk L is broken outand provided with vertical guides Z, on which a rectangular frame, H, isguided. Frame H is placed intermediately between the ring-frame andface-plate, and carries on transverse guides at the faceplate A, thelatter being provided with corresponding ways. The intermediateguide-frame H is also slotted or broken out like the disk L, to admitthe unobstructed motion of the rod or spindle Bin following the gearing.The joint working of the ring-frame and disk and of the vertical andtransverse guides causes the face-plate A to follow smoothly the motionof its gearing mechanism.

It may be remarked in this connection that the friction of the guidemechanism may be reduced by means of properly-disposed antifrictionrollers between the vertical guide G and the toothed frame D, betweenthe ringframe M and disk L, 850., so that the regular motion of thefaceplate without jars or stops is obtained.

Having thus described myin vention, I claim as new and desire to secureby Letters Patcum- 1. In an engine-lathe, the combination of the pinionF, a toothed frame, D, front and rear face-plates, A O, plate G beingremovably secured to the frame D, vertical guide G, and the guides H andm m, whereby said faceplates are permitted to follow the movement of theframe D, substantially as set forth.

2. In an enginelathe, the combination, with the spindle E and a pinion,F, provided with a collar, f, of a toothed frame, D, formed with araised guide, (I, and a vertical guide, G, substantially as set forth.

3. In an engine-lathe, the combination of a faceplate, A, and a drivingmechanism for moving it in irregular curves or lines, with VitnessesGERARD VON N AWROCKI, BERTHOLD R01.

